<?php
/**
 * Smarty Internal Plugin Resource Eval
 *
 * @package Smarty
 * @subpackage TemplateResources
 * @author Uwe Tews
 * @author Rodney Rehm
 */

/**
 * Smarty Internal Plugin Resource Eval
 *
 * Implements the strings as resource for Smarty template
 *
 * {@internal unlike string-resources the compiled state of eval-resources is NOT saved for subsequent access}}
 *
 * @package Smarty
 * @subpackage TemplateResources
 */
class Smarty_Internal_Resource_Eval extends Smarty_Resource_Recompiled {

	/**
	 * populate Source Object with meta data from Resource
	 *
	 * @param Smarty_Template_Source   $source    source object
	 * @param Smarty_Internal_Template $_template template object
	 * @return void
	 */
	public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template=null)
	{
		$source->uid = $source->filepath = sha1($source->name);
		$source->timestamp = false;
		$source->exists = true;
	}

	/**
	 * Load template's source from $resource_name into current template object
	 *
	 * @uses decode() to decode base64 and urlencoded template_resources
	 * @param Smarty_Template_Source $source source object
	 * @return string template source
	 */
	public function getContent(Smarty_Template_Source $source)
	{
		return $this->decode($source->name);
	}

	/**
	 * decode base64 and urlencode
	 *
	 * @param string $string template_resource to decode
	 * @return string decoded template_resource
	 */
	protected function decode($string)
	{
		// decode if specified
		if (($pos = strpos($string, ':')) !== false) {
			if (!strncmp($string, 'base64', 6)) {
				return base64_decode(substr($string, 7));
			} elseif (!strncmp($string, 'urlencode', 9)) {
				return urldecode(substr($string, 10));
			}
		}

		return $string;
	}

	/**
	 * modify resource_name according to resource handlers specifications
	 *
	 * @param Smarty $smarty        Smarty instance
	 * @param string $resource_name resource_name to make unique
	 * @return string unique resource name
	 */
	protected function buildUniqueResourceName(Smarty $smarty, $resource_name)
	{
		return get_class($this) . '#' .$this->decode($resource_name);
	}

	/**
	 * Determine basename for compiled filename
	 *
	 * @param Smarty_Template_Source $source source object
	 * @return string resource's basename
	 */
	protected function getBasename(Smarty_Template_Source $source)
	{
		return '';
	}

}

?>